Shoemaker&#39;s jack



L. L. BERG.

SHOEMAKEB'S JACK. APPLICATION FILED MAR. 30, 1920.

F i g. 2

23mm Sept. 28, 1320 .Zouis 11.136 INVENTOR.

ATTORNEY.

bearing LOUIS L. BERG, 0F BELLINGHAM, WASHINGTON.

SHOEMAKERS JACK.

Specification of Letters Patent. Patented Sept. 28, 1920.

. Application filed March 30, 1920. Serial No. 369,914.

To all whom it may concern:

Be it known that I, LOUIS L. BERG, a citizen of the United States, and residing at Bellingham, in the county of Whatcom and State of Washington, have invented a new and useful Shoemakers Jack, of which the following is a specification.

My invention relates to improvements in shoemakers jacks and the objects of my invention are to provide a jack the staff of which is freely revoluble on a vertical axis, yet retainable against a small force under frictional control of a pedal, at any point in its revolution.

I attain these objects with the mechanism illustrated in the accompanying drawings in which Figure 1 is a plan viewof my jack mounted on the side of a bench, Fig. 2 is a front elevation of Fig. 1, Fig. 3 is a plan view of myjack mounted on a stand, and Fig. 4; is a front elevation of Fig. 3.

Similar characters refer to similar parts in the several views. Certain parts are broken away to show others hidden thereby.

More particularly: 5 is a footstep socket.

5 is the flange of the same adapted for fastening to the floor. 5*, 5 are two lugs on 5, one on each side of a radial slot through both 5 and 5 to the central bore.

6. is a pedal fulcrumed in lugs 5", and bearing on staff 7.

7 is a hollow staff with a closed lower end mounted in the bore of bearing 5. The upper end ofthe staff is formed to mount the last plug.

8 is a last plug removably placed in the upper end of stafi 7 and mounts the lasts.

9 is a bench to the front edge of which staif 7 is fastened for revolution in bearing 9.

10 is the semicircular base of a stand, adapted for fastening to the floor. 10 is an upper bearing for staff 7 and is connected to base 10 by braces 10. When it is desired to use my jack away from a bench the stand is employed as shown.

11 is a last removably mounted on last plug 8.

For greatest convenience, a shoemakers jack should be easily revoluble on a vertical axis or-retainable at any point in its revolution at the will of the operative.

To approximately provide for this it is customary to clamp the staff to the edge of a bench with bearing 9 under sufiicient pressure to require considerable force to revolve the staff. This but partially accomplishes the desired end and makes the use of the jack wearisome.

With my construction, as described, staff 7 is free to revolve in its bearings except when pressure is applied to pedal 6. This pressure is applied by a foot of the operative at such times and degree, to the limit of his ability, as suits his convenience while using. the jack to support and retain the work.

Having thus fully disclosed my invention, what I claim is new and desire to secure by Letters Patent is,

1. In combination, a footstep socket attachable to the floor, a staff stepped for revolution in said socket, an upper bearing revolubly mounting said staff, a shoe-retaining device removably mounted on the upper end of said staff, and a pedal fulcrumed in said footstep and frictionally engageable with said stafl.

2. In combination, a footstep socket attachable to the floor, a staif stepped in said socket and revoluble therein, an upper bearing on said staff having bracket connections to the floor, a shoe-retaining device removably mounted on the upper end of said staff, and a pedal fulcrumed on said footstep bearing on said staff.

LOUIS L. BERG. 

